Thermocapillary instabilities in the liquid layer with two deformable surfaces

doi:10.1016/j.ijheatmasstransfer.2023.125077

	Thermocapillary instabilities in the liquid layer with two deformable surfaces
	Hu, KaiXin; Sun, YuWen; Hu, PengHui; Wang, Sheng; Chen QS(陈启生)
刊名	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
	2024-04-01
卷号	221 页码:12
关键词	Thermocapillary Instability Liquid layer
ISSN号	0017-9310
DOI	10.1016/j.ijheatmasstransfer.2023.125077
通讯作者	Hu, Kai-Xin(hukaixin@nbu.edu.cn)
英文摘要	A liquid layer with two deformable free surfaces subject to thermocapillary instabilities is studied. The critical Marangoni number Mac is determined as a function of the surface tension number S, the Prandtl number Pr and the smallest wave number k0 limited by the length of the layer. The results show that Mac always increases with both S and k0. When S is relatively small, the preferred mode is either the streamwise wave or the spanwise stationary mode. However, as S is increases, it changes to the hydrothermal waves while Mac tends to a constant. The streamwise wave at small Pr is a type of surface wave instability (SWI), without any rolls inside the layer. Other preferred modes belong to the convective instability (CI), which consists of counter-rotating rolls within the layer and small fluctuations on the surface. Energy analysis shows that the CI obtains most of its power from Marangoni forces, while the main energy source of the SWI is the work done by the shear stress caused by surface deformation. Additionally, Mac often increases with the Biot number Bi, while the opposite case appears in the SWI at small Pr.
分类号	一类
资助项目	National Natural Science Foundation of China[11872032] ; National Natural Science Foundation of China[12372247] ; Zhejiang Provincial Natural Science Foundation[LY21A020006] ; Science and Technology Innovation 2025 Major Project of Ningbo City[2022Z213] ; K. C. Wong Magna Fund in Ningbo University
WOS关键词	FLOW ; WAVE ; CONVECTION ; STABILITY ; STEADY ; FILM
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
语种	英语
WOS记录号	WOS:001143460900001
资助机构	National Natural Science Foundation of China ; Zhejiang Provincial Natural Science Foundation ; Science and Technology Innovation 2025 Major Project of Ningbo City ; K. C. Wong Magna Fund in Ningbo University
其他责任者	Hu, Kai-Xin
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/94136]
专题	力学研究所_国家微重力实验室
推荐引用方式 GB/T 7714	Hu, KaiXin,Sun, YuWen,Hu, PengHui,et al. Thermocapillary instabilities in the liquid layer with two deformable surfaces[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2024,221:12.
APA	Hu, KaiXin,Sun, YuWen,Hu, PengHui,Wang, Sheng,&陈启生.(2024).Thermocapillary instabilities in the liquid layer with two deformable surfaces.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,221,12.
MLA	Hu, KaiXin,et al."Thermocapillary instabilities in the liquid layer with two deformable surfaces".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 221(2024):12.